Staff Sergeant David "Spartan" Lincoln (callsign Obsidian Zero-Two) was a US Army Delta Force operator who served as the deputy commander of Team Obsidian. Originally a member of the 2nd Force Reconnaissance Company of the United States Marine Corps Force Reconnaissance, he applied to join Delta Force in early 1997, passing the selection process and being assigned to Team Erythrite. After several years of service in Delta, he was eventually promoted to Sergeant First Class and placed in command of Team Obsidian in 2005, a position he held until early 2011, where, after an incident at the U.S. Embassy in Iraq, he was demoted and replaced by Elijah York, a young soldier from the 75th Ranger Regiment.